A Conductometric Sensor Specific for Cationic Surfactants | Zendy

Hnaien Mouna | Zendy; Dzyadevych Sergei | Zendy; Lagarde Florence | Zendy; JaffrezicRenault  Nicole | Zendy

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A Conductometric Sensor Specific for Cationic Surfactants

Author(s) -

Hnaien Mouna,

Dzyadevych Sergei,

Lagarde Florence,

JaffrezicRenault Nicole

Publication year - 2012

Publication title -

electroanalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.574

H-Index - 128

eISSN - 1521-4109

pISSN - 1040-0397

DOI - 10.1002/elan.201200055

Subject(s) - sodium tetraphenylborate , cationic polymerization , conductometry , tetraphenylborate , pulmonary surfactant , plasticizer , chemistry , membrane , analytical chemistry (journal) , electrode , inorganic chemistry , materials science , chromatography , polymer chemistry , organic chemistry , ion , biochemistry

In this work, a fast, sensitive and miniaturised conductometric sensor based on interdigitated electrodes, working in differential mode, was developed for the determination of cationic surfactants. The membrane was composed of a polymer (PVC), a plasticizer (dinonylphtalate (DNP)) and a carrier (sodium tetraphenylborate (NaBΦ 4 )). The sensor response was linear from at least 10 −9 M to 10 −2 M for dodecyltrimethylammonium (DTA + ). No significant loss of sensor response was observed after 8 weeks. The sensor exhibited a lower sensitivity and a narrower dynamic range for tetrabutylammonium, decyltrimethylammonium and cetyltrimethylammonium cationic surfactants. A ten times lower sensitivity was observed for laurylsulfate anionic surfactant, (LS − ).

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